Conveners
Top Physics
- There are no conveners in this block
Top Physics
- There are no conveners in this block
Top Physics
- Andrew Ivanov (Kansas State University (US))
- Christopher Neu (University of Virginia (US))
Top Physics
- There are no conveners in this block
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Nikolaos Kidonakis (Kennesaw State University)04/08/2015, 14:00Top PhysicsI present a calculation of higher-order corrections from NNLL threshold resummation for cross sections and differential distributions in top-antitop pair production and in single-top production. I show that soft-gluon threshold corrections are the dominant contribution to top-quark production and closely approximate exact results through NNLO. I show aN$^3$LO results for the total $t{\bar t}$...Go to contribution page
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Thomas Andrew Schwarz (University of Michigan (US))04/08/2015, 14:30Top PhysicsThe most up-to-date top quark pair production cross section measurements will be presented for p-p collisions with the ATLAS detector at the LHC. Both differential and inclusive measurements will be discussed, as well as analyses focusing on rare decays such as top quark pairs associated with an additional boson or jets. The results will be discussed in the context of new physics, Monte...Go to contribution page
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Dr Gabriele Benelli (University of Kansas and Fermilab LPC Distinguished Researcher)04/08/2015, 15:00Top PhysicsTop pair production cross-section measurements and theoretical predictions have achieved unprecedented precision. A review is presented of recent top-quark pair inclusive and differential production cross sections in proton-proton collisions at the LHC at centre-of-mass energies of 7 and 8 TeV, using data collected by the CMS experiment in the years 2011 and 2012. The differential...Go to contribution page
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Rebeca Gonzalez Suarez (University of Nebraska (US))04/08/2015, 16:00Top PhysicsThe Run-1 of the LHC was very successful for single top physics in CMS. The main single top production mode, t-channel, is well established. The t-channel cross-section was measured with unprecedented precision and t-channel events have been used for the first time to perform measurement of SM properties, such as: |Vtb|, top quark polarization, or W-helicity fractions. The associated...Go to contribution page
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Kenneth Bloom (University of Nebraska (US))04/08/2015, 16:30Top PhysicsWe present the most recent measurements on top-quark physics obtained with Tevatron $p \bar p$ collisions recorded by the D0 experiment at $\sqrt s=1.96$ TeV. The full Run II data set of 9.7 fb$^{-1}$ is analyzed. Both lepton+jets and dilepton channels of top-quark pair production are used to measure the differential and inclusive cross-sections, the forward-backward asymmetries, the...Go to contribution page
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Philip Ilten (Massachusetts Inst. of Technology (US))04/08/2015, 17:00Top PhysicsExcellent vertexing, tracking, and jet energy resolution enable a variety of forward analyses to be performed using data from the LHCb detector. Recent results on the performance of inclusive b and c-tagging algorithms used by LHCb are presented. These taggers are applied to W+jet data to measure W+b-jet and W+c-jet asymmetries as well as ratios to inclusive W+jet production....Go to contribution page
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Graham Wilson (University of Kansas (US))04/08/2015, 17:30Top PhysicsThe International Linear Collider and Compact Linear Collider projects aim to build a linear electron-positron collider with a center-of-mass energy well above the top quark pair production threshold. In this contribution an overview is presented of the potential of their top quark precision physics programme. One of the highlights is a precise determination of the top quark mass through a...Go to contribution page
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Zhi Liu (Indiana University)05/08/2015, 14:00Top PhysicsSignals for Lorentz and CPT violation can appear in a wide range of experiments including hadron colliders like the LHC. We present a calculation of the Lorentz-violating cross section for top-quark pair production via gluon fusion. This process dominates at the LHC, and analysis of LHC data should permit sharpening the constraints on top-quark Lorentz violation obtained recently by the D0...Go to contribution page
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Ziqing Hong05/08/2015, 14:30Top PhysicsThe forward-backward asymmetry of the top quark pair production at the Tevatron experiments is one of the hottest topics in particle physics in the recent years. It provides unique precision tests of the standard model and of physics beyond the standard model. We present the latest measurement of the top forward-backward asymmetry in the dilepton final state and summarize the legacy results of...Go to contribution page
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Daniel Marley (University of Michigan (US))05/08/2015, 14:55Top PhysicsA summary of results for the top quark charge asymmetry, $\text{A}_{\text{C}}$, measured using 20.3 fb$^{-1}$ of data recorded with the ATLAS detector at a center-of-mass energy $\sqrt{s}=8$ TeV is presented. Events where either both top quarks decay leptonically (dileptonic), or one top quark decays leptonically and the other hadronically (semi-leptonic) are considered. The semi-leptonic...Go to contribution page
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Andrew Brinkerhoff (University of Notre Dame (US))05/08/2015, 16:00Top PhysicsNew measurements of top quark pair production in association with a W or Z boson are presented, using 19.5 fb−1 of 8 TeV pp collision data collected by the CMS experiment at the CERN LHC. Final states with opposite-sign, same-sign, three, and four charged leptons plus b-tagged jets are examined. Signal ttW and ttZ events are identified by reconstructing the top quark pair, yielding the most...Go to contribution page
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Chen Zhou (Duke University (US))05/08/2015, 16:25Top PhysicsWe present a measurement of the production cross sections of top quark pairs in association with a W or Z boson. The measurement uses 20.3 $fb^{-1}$ of data from proton-proton collisions at $\sqrt{s}$=8 TeV recorded by the ATLAS detector at the LHC at CERN. Four different final states are considered: two opposite-sign leptons, two same-sign leptons, three leptons, and four leptons. We report...Go to contribution page
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Andrew Ivanov (Kansas State University (US))05/08/2015, 16:50Top PhysicsWe present a measurement of the production cross-section of top-quark pairs in association with a photon in pp collisions at center-of-mass energy of 8 TeV. The data was recorded at the CMS experiment, corresponding to 19.7 fb-1 integrated luminosity. The measurement is performed in dilepton and lepton+jets final states. Data-driven methods are used to estimate the photon identification...Go to contribution page
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Jesse Alan Heilman (University of California Riverside (US))05/08/2015, 17:15Top PhysicsA search is presented for standard model (SM) production of four top quarks in pp collisions at the LHC. Using Run-1 data corresponding to an integrated luminosity of 19$fb^{-1}$, a combination of kinematic reconstruction and multivariate techniques is used to distinguish between the small signal ($\sigma^{SM}_{t \bar{t} t \bar{t}} \sim 1 fb$) and backgrounds in the lepton + jets channel. ...Go to contribution page